Cited 7 time in webofscience Cited 9 time in scopus

Solar spectrum photocatalytic conversion of CO2 to CH4 utilizing TiO2 nanotube arrays embedded with graphene quantum dots

Title
Solar spectrum photocatalytic conversion of CO2 to CH4 utilizing TiO2 nanotube arrays embedded with graphene quantum dots
Authors
Zubair, MuhammadKim, Hye RimRazzaq, AbdulGrimes, C.A.In, Su Il
DGIST Authors
In, Su Il
Issue Date
2018-07
Citation
Journal of CO2 Utilization, 26, 70-79
Type
Article
Article Type
Article
ISSN
2212-9820
Abstract
TiO2 nanotube arrays (TNT) offer an exciting prospect as a photocatalytic material architecture due to the combined properties of high surface area, 1-D vectorial charge transfer, and reduced photogenerated charge recombination. However the TiO2 band gap (≈3.2eV) limits light absorption to the UV region, which comprises but a small fraction of the solar spectrum energy. Graphene is known to effectively absorb visible light, and due to its high conductivity promote efficient charge transfer. Herein, we present a novel photocatalyst composed of TNTs sensitized with electrodeposited graphene quantum dots (GQDs). GQDs electrodeposition-duration is varied to optimize photocatalytic performance of the resulting nanostructured graphene-TNT (G-TNT) films. Under solar spectrum illumination we find optimal G-TNT samples promote a CO2 to CH4 photocatalytic conversion rate of 1.98ppmcm-2 h-1, with carbon origin confirmed by 13CO2 isotopic test. © 2018 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/6389
DOI
10.1016/j.jcou.2018.04.004
Publisher
Elsevier Ltd
Related Researcher
  • Author In, Su-Il Green and Renewable Energy for Endless Nature(GREEN) Lab
  • Research Interests CO2 conversion to hydrocarbon fuels; Water splitting for hydrogen generation; Quantum dot devices; Dye sensitized solar cells; Environmental remediation; Synthesis of functional nanomaterials; CO2 연료전환; 수소생산을 위한 광전기화학적 물분해; 양자점 태양전지; 염료감응 태양전지; 공해물질 저감연구; 기능성 나노소재 개발
Files:
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Collection:
Department of Energy Science and EngineeringGreen and Renewable Energy for Endless Nature(GREEN) Lab1. Journal Articles


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